Road-spraying machine.



J. A. JOHNSTON. ROAD SPRAYING MACHINE.

I APPLICATION FILED AUG. 21, 1911. 1,101,936; Patented June 30,1914,

' I 3 SHEETS-SHEET 1.

214470521; for:

J. A. JOHNSTON. ROAD SPRAYING MACHINE.

) APPLIOATION'IILBD AUG. 21, 1911. I 1,101,936. Patented June 30,1914, Is SHEETS-SHEET 2.

J. A. JOHNSTON. ROAD SPRAYING MACHINE.

APPLIQATION FILED AUG. 21, 1911. 1 ,101,936. Patented June 30,1914. 3 I3 SHEETS-SHEET 3.

iii

or loosened.

JOHN A. JOHNSTON, F WORCESTER, MASSACHUSETTS.

noen-srsevilve MACHINE.

Specification of Letters Patent.

Application filed August 21, 1911.

Patented June 3%, ihie. Serial no. 645,261.

T 0 all whom it may concern: j

Be it known that 1, JOHN A. Joninsron, a citizen of the United States,residing at lVorcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Road Spraying, Machine, ofwhich the following is a specification.

This invention relates to an apparatus for surfacing roads, streets, andthe like.

The principal objects of the invention are to provide'for dragging atrailer behind a tank vehicle in such a way that the trailer shall notbe forced to follow the exact course or" the tank vehicle, but can besteered independently thereof; to provide a simple, convenient, andeffective form oi steering mechanism for the trailer; to provide an im--proved. forni of connection between the preceding tank or tank vehicleand the following trailer; and to provide other improve ments in detailsof construction will appear hereinafter Reference is to be had to theaccompany ing drawings, in which- Figure 1 is a side elevation of a'trailer for supporting the pump and connections for discharging theroadsurfacing material; Fig. 2 is a plan of the some showing'the coirncction thereof with the tanlr vehicle which draws the trailer; Fig. 3is a plan on enlarged scale of a portion of the discharge connectionsfrom the pump; Fig. 4- is a sectional view of the same in the line of 3;l 5 is a side elevation of the strainer. 6 is side elevation of theconnections at the rear of the tank; and Fig. 7 is a sectional view ofthe same on the line 77 of Fig, 6.

The invention is shown comprising a supply tank 5 for the road surfacingmaterial arranged on wheels. ,llt is referred to hereinafter as a. tankvehicle. These parts can be of any ordinary construct-ion and notillustrated herein in detail, except to show their relation with. thetrailer body 6. The tank is provided with a discharge pipe '7 having ashut off 8. This pipe is provided with a quarter turn and its horizontalportion is in two parts connected by a pair of coupling plates 9 and 10,one of which has I l New in order to draw the material. from thehandles. The plate 9 has holes 11 enlarged at one end through whichextend bolts that screw into the plate These bolts have handles 12 bywhich they can be tightened lVhen loosened the plate 10 swivel joints13, 1s and passes from can be turned until the bolts are in the en;

ing on a vertical transverse'azis. and a third I one 15 on a transversehorizontal axis. The latter communicates with a pipe 16 which performstwo functions. In the first place this pipe-constitutes the connectionbetween the tank vehicle and. the trailer and serves to draw the traileralong behind the tank vehicle. This Will explain Why the three 15 areemployed. In the second place this pipe servesv as a facing material tothe in-take 055 a steam pump 17 on the body of the trailer. This thebody of the trailer and all the flexibility comes at the joints 13, 14and 15.

Normally the road surfacing material the discharge outlet 18 of the pumpalong a pipe 19 into a connection 29 and up into a chamber 21. However,if it is desired to force the material in these and the otherconnccticnsback into the'tanir 5 this is accomplished by means of thefollowin connections. The pipe 16- is connected with the pipe 19 by abypass 22. This by is controlled by a three-way valve 23 operated bylinkrZ. This normally is open to allow free course of the liquid alongthe pipe 19 toclose communication between this pipe and the lay-pass.However this aive can he turned to close the pipe 122 and to connectouter end that is, the connection 20, with the hy-pass, Another valve-25 is located in the-supply pipe between the by-pass :22 and. the tank.-Ellis valve can De opened and closed by a link 26. ()onuect ed with thepipe 15% between the discharge outlet 18 and the valve 23 s a T 27 whichcommunicates with a second by pass 28 through a spring controlledpressure valve 'sngply pipe for supplying the roadisur pipe 16 isrigidly connected with the pump jwhich of course is rigidlyconnectedwith 29 freely communicating with, the supply pipe 15 on the supply sideof the valve 25.

outlet pipes and chamber and force it back into the supply tank thevalve 23 1S turned to close direct connect-ion through the pipe 15 andallow the outer end of the nipetc 116 e hle T a readily eemenl flwllfilicasing 21 "Ihlil cover in which U slets 15 21ml Wi 1 imle llerl Vereeompe l he vm mr gunl;

usl hly seemed at opposite ends 1th the axle 59 which carries s5; wlliehsupuert this trailer. leis exle is provided Wii h the meal fifth. wheel6: The flexible connection at each. e l passes ever 9. curved plate (3].eoneemrie lil': ih entml axis on which the axle 59 is mlaplee 40 turn.lit will be obvious lhat on account of the front end of the pipe 16, ehcom miles the tongue, belr helcl at ihe rear the tank vehicle, theturning 0f ihis axle will cause 'l-he heel 01 he nil to move to theright 01' left desired, so 3129."; the operter zen keep the in propernesi'iion independently of the melion 0f the null: vehicle.

Although have illustrated. and (lescri. We'l -wed en'lbealiment of theinvention 1 whiny (leleils 01L COlSli'il um aware aihui thei:11"e1').iil0n nut Wlllll many momfiez from its scope claims Thereforell H21 01' an m-l let l) h am x "idler 21ml having g1 rigid. l eeextend; lg forwardly l lee to seal swiveled ihxte the wry me 01? he 2 on'ihe trailer for SWl) we ih's ive-t and thereby swi: U Q le Heller.pump, and longe: about (l juinli. l1, device of lhe ehareesfiei' (lesselhe mmmamilen e tank vehicle rigid blisehm'gze pipe provided wuzh lih'ul swivel. jeinix, and a transverse herizmi inl fjYl'lYJl jm'ni, afuller, pump rlgiuly mounted on the trailer, a horizontal hpe 1" llyconnected with the pump and Con-- heeled with the horizontalswivel-join; m supplying material to the pump mul the Muller and meanson eleel'i the lireilez' exit is (ll-awn. h llllli Vehicle and turningthe he pump abeui the vertical SK'V'lx-"Bl jo lln (leviee n2 the ch31lhe eenzhil'mi'iml w h wtlelx pipe L 'otienrol fl v vL L is h Ml the ex:and.

pipe extending forwardly therefrom and my hand, in the presence of twosubscribing coupled to said swiveled joint so as to con- Witnesses.stitute the tongue of the trailer and a spray pipe connected with saidpump to swing on JOHN JOHNSTON a horizontal transverse axis, but movableas Witnesses:

a who1e With the pump. ALBERT E. FAY,

In testimony'whereof I have hereunto set C. FORREST WESSON.

